Calling someone "Horsebox" is like saying "mate".
"Well Horsebox, whats the craic?" Irish country slang word mostly used around Cavan and the midlands
ayon kay Dagboy ika-07 ng Hulyo, 2005
1 more definition
A vagina only designed to take big cock
I saw you talking to Bobby's girl last night, you bang? No way dude she has a horsebox...
ayon kay EddieP ika-14 ng Abril, 2015